To head off allergies, expose your kids to pets and dirt early

The USA Today reports:

Here's the conventional wisdom: Pets promote allergy, kids shouldn't eat peanuts until they're at least 3, and intestinal worms are nothing more than an icky reminder of life before flush toilets.

Here's the new wisdom: Early exposure to pets, peanuts and intestinal worms might actually be good for you, because they program the developing immune system to know the difference between real threats, such as germs, and Aunt Millie's cat.

Evidence to support this view has been mounting for more than a decade. But now, for the first time, researchers are beginning to test remedies based on these theories in patients. Other doctors are trying to make use of novel approaches to retrain the immune system once it's too late and allergies set in.

You'll want to read the whole article.